Particle size measurement in glass powder beds using optical coherence tomography

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DOIResolve DOI: http://doi.org/10.1117/1.2896455
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TypeArticle
Journal titleOptical Engineering
Volume47
Issue3
Pages033601-1033601-9; # of pages: 9
Subjectparticle sizing; size distribution; optical coherence tomography; glass powders
AbstractOptical coherence tomography was used to collect cross-sectional images of glass powder beds consisting of microspheres with diameters ranging from 8 to 175 µm. Images were formed by a collection of individual interferogram envelopes that give the backscattered light amplitude as a function of the optical path in the glass powder bed. The diameter distribution, for microspheres located near the surface of the beds, is obtained by appropriate peak distance measurements on threshold-selected envelopes after having performed the surface profilometry. The measured distributions are in good agreement with those obtained by laser diffraction. When considering the whole powder volume, the evaluation of the mean light penetration depth inside the powder beds proves to be a useful approach to evaluate the mean particle diameter, although no information is obtained on the actual particle size distribution in this case. Two simplified models are introduced to understand the linear relationship observed between the penetration depth and the mean particle size.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); NRC Industrial Materials Institute
Peer reviewedYes
NRC number48839
NPARC number15774995
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Record identifier9b004da8-331e-4d66-a933-e2835e697829
Record created2010-07-06
Record modified2016-05-09
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